This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 39 |
| 3 | 216 |
| 4 | 1274 |
| 5 | 8200 |
| 6 | 58017 |
| 7 | 451283 |
| 8 | 3847960 |
| 9 | 35818351 |
| 10 | 362337006 |
| 11 | 3965467281 |
| 12 | 46749441514 |
| 13 | 591291743032 |
| 14 | 7993582141984 |
| 15 | 115104783083605 |
| 16 | 1759853074058289 |
| 17 | 28485332959460764 |
| 18 | 486811835886953020 |